Impact of Fluorination and Chlorination on the Electronic Structure, Topology and in-Plane Ring Normal Modes of Pyridine

2021 ◽  
Author(s):  
Enrico Benassi ◽  
Tamara Vaganova ◽  
Evgenij V Malykhin ◽  
Haiyan Fan
Keyword(s):  
Raman Spectroscopy ◽  
Electronic Structure ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Normal Modes ◽  
Ir And Raman Spectroscopy ◽  
Structure Topology ◽  
Ft Ir ◽  
Ir And Raman

Seven partially and fully fluorinated/chlorinated pyridines were investigated by means of FT-IR and Raman spectroscopy combined with quantum chemical calculations with the main aim to detect how the nature and...

FT-IR and Raman Spectroscopy of C58BN

1997 ◽  
pp. 271-273
Author(s):  
K. Antonova ◽  
P. Byshewski ◽  
G. Zhizhin ◽  
J. Piechota ◽  
M. Marhevka
Keyword(s):  
Raman Spectroscopy ◽  
Ir And Raman Spectroscopy ◽  
Ft Ir ◽  
Ir And Raman

scholarly journals Evaluation of Salmon Adhesion on PET-Metal Interface by ATR, FT-IR, and Raman Spectroscopy

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
E. Zumelzu ◽  
M. J. Wehrhahn ◽  
F. Rull ◽  
H. Pesenti ◽  
O. Muñoz ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Structural Changes ◽  
Polymer Coatings ◽  
New Production ◽  
Ir And Raman Spectroscopy ◽  
Chromium Vi ◽  
Physical Tests ◽  
Ft Ir ◽  
Ir And Raman

The material employed in this study is an ecoefficient, environmentally friendly, chromium (VI)-free (noncarcinogenic) metal polymer. The originality of the research lies in the study of the effect of new production procedures of salmon on metal packaging with multilayer polyethylene terephthalate (PET) polymer coatings. Our hypothesis states that the adhesion of postmortem salmon muscles to the PET polymer coating produces surface and structural changes that affect the functionality and limit the useful life of metal containers, compromising therefore their recycling capacity as ecomaterials. This work is focused on studying the effects of the biochemical changes of postmortem salmon on the PET coating and how muscle degradation favors adhesion to the container. The experimental design considered a series of laboratory tests of containers simulating the conditions of canned salmon, chemical and physical tests of food-contact canning to evaluate the adhesion, and characterization of changes in the multilayer PET polymer by electron microscopy, ATR, FT-IR, and Raman spectroscopy analyses. The analyses determined the effect of heat treatment of containers on the loss of freshness of canned fish and the increased adhesion to the container wall, and the limited capability of the urea treatment to remove salmon muscle from the container for recycling purposes.

Structural and Optical Characteristics of Aqueous Solutions of Acetic Acid

2019 ◽  
Vol 73 (5) ◽  
pp. 503-510 ◽  
Author(s):  
Shukur Gofurov ◽  
Urol Makhmanov ◽  
Abdulmutallib Kokhkharov ◽  
Oksana B. Ismailova
Keyword(s):  
Raman Spectroscopy ◽  
Refractive Index ◽  
Acetic Acid ◽  
Aqueous Solutions ◽  
Mole Fraction ◽  
Optical Characteristics ◽  
Ir And Raman Spectroscopy ◽  
Refractometric Method ◽  
Ft Ir ◽  
Ir And Raman

A refractometric method, coupled with molecular dynamics study, attenuated total reflection Fourier transform infrared (ATR FT-IR), and Raman spectroscopy, was used to determine optical characteristics of concentration features of aqueous solutions of acetic acid. Measurements of the refractive index of aqueous solutions of acetic acid in the wide range of acetic acid concentrations (∼ 0 ÷ 1 mole fraction) in a solution at a room temperature were conducted. Maximum value of refractive index was detected at a concentration of ∼0.3 mole fraction. The deviation from the parabolic form of the dependence of the refractive index on the concentration occurs at a concentration of ∼0.8 mole fraction. As far as we know, this deviation has been observed for the first time. The maximum is attributed to the largest number of molecular interactions between water and acetic acid molecules, while the deviation is associated with the parallel orientation of acetic acid molecules. To identify the reconstructing of molecules in the system, FT-IR and Raman spectra of these solutions at a concentration of ∼0.3 and ∼0.8 mole fraction were recorded and compared with pure solutions. The data obtained by using ATR FT-IR and Raman spectroscopy support the idea that the refractometric method is sensitive to determine the structural states of aqueous solutions of acetic acid.

Characterization of human ovarian teratoma hair by using AFM, FT-IR, and Raman spectroscopy

2011 ◽  
Vol 74 (12) ◽  
pp. 1121-1126 ◽  
Author(s):  
Kyung Sook Kim ◽  
Jinwoo Lee ◽  
Min-Hyung Jung ◽  
Young Joon Choi ◽  
Hun-Kuk Park
Keyword(s):  
Raman Spectroscopy ◽  
Ovarian Teratoma ◽  
Ir And Raman Spectroscopy ◽  
Ft Ir ◽  
Ir And Raman
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